Frost dates for Thousand Oaks, California
In a typical year, Thousand Oaks’s last spring frost lands around Jan 24 and the first fall frost around Dec 15, a growing season of about 325 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 10b.
Right now the growing season is open, with about 51 days until the typical first fall frost.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | Dec 21 | Nov 27 |
| 50 percent | Jan 24 | Dec 15 |
| 90 percent | Mar 5 | Jan 26 |
A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.
Soil in Thousand Oaks is typically around 67°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
Plantable now in Thousand Oaks
- Radish (Cherry Belle)
- Spinach (Space)
- Lettuce (Black Seeded Simpson)
- Swiss chard (Fordhook Giant)
- Dill (Bouquet)
- Turnip (Purple Top White Globe)
- Arugula (Astro)
- Mustard greens (Red Giant)
Timing comes from the same temperature engine the app uses, run against Thousand Oaks’s normals for today.
Common questions
When is the last frost in Thousand Oaks, California?
Thousand Oaks’s last spring frost falls around January 24 in a typical year. One year in ten it is done by December 21, and one year in ten frost holds on until March 5. Frost-sensitive planting usually waits for the late side of that band.
When is the first fall frost in Thousand Oaks?
The first fall frost arrives around December 15 in a typical year, as early as November 27 in an early year and as late as January 26 in a late one.
How long is the growing season in Thousand Oaks?
About 325 days, counted between the typical last spring frost and the typical first fall frost.
What USDA zone is Thousand Oaks in?
Thousand Oaks is in USDA hardiness zone 10b under the 2023 USDA Plant Hardiness Zone Map.
Dates come from 30-year NOAA climate normals for the nearest reporting station. They describe odds, not a forecast.
Nearby cities
- Simi Valley, CA (around Jan 8 to Jan 1)
- Oxnard, CA (around Dec 29 to Dec 24)
- Santa Clarita, CA (around Jan 8 to Jan 1)
- Glendale, CA (around Jan 2 to Dec 26)
- Los Angeles, CA (around Jan 8 to Jan 7)
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